高中英语 Unit4《Global Warming》学案1 新人教版选修6

Unit 4 Global WarmingTeaching Goals:1.To discuss and read about global warming.2.To learn to write a poster.Teaching Procedures:Step 1. Warming upTurn to page 30. Listen to the tape and follow in a low voice. Pause where the reader pauses. Pay attention to the pronunciation and intonation.Step 2. Reading1. Individual workWhen you read the text for the second time you are supposed to underline all the useful collocations .You have to copy them into your notebook. I hope you can fully understand the importance of expressions in English learning.2. Group workDiscuss in groups the collocations from the text.Do a project on; doabouthave effect on; start withget suggestions; have to power to;make a difference; put up withcome fromreduce the carbon dioxide content; be startedwith; use energy inleaveon; turnoff; turn up the heat; ride a bike; makefrom; bemade from recycled materials; save energy; plant trees in the garden; absorb carbon dioxidefrom; talk withaboutStep 3. WritingYou are going to make a poster to tell your schoolmates ways to reduce the amount of carbon dioxide in the air.For your reference:How To Reduce the Amount of Carbon Dioxide Going into the Air.Use public transportation, walk or bike to school or work. If you must drive, join a carpooland use a car that gets high mileage. Use energy-efficient appliances and weatherize your home.Use renewable energy sources, like solar heart or wind power ,which dont emit carbondioxide. Switch from coal and oil to natural gas in power plants and factories .Natural gas releases theleast amount of carbon dioxide.Step 4. Listening and discussingNow turn to page 31. Li Ben is doing an interview with Professor Chen about the use of different sources. Read the statements and listen to the tape recording of the interview to decide which statement the professor does not agree with.Well have to stop using fossil fuels.About 90% of the worlds energy comes from fossil fuels.We can replace fossil fuels with renewable sources of energy.Nuclear power is a good source of energy.In the future, well need new technologies to replace fossil fuels.Its the developed countries who are to blame for producing most of the carbon dioxide.Step 5. Closing downDiscuss what we individuals can do about global warming in groups of four.Non-renewable不可再生能源Renewable可再生能源Coal煤炭能源Gas石油能源Nuclear核能源Solar太阳能Wind风能Hydro-electric水电能源Geothermal地热能源Ste